<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        p{
            font-size: 30px;
        }
        div::before{
            content:'【';
        }
        div::after{
            content:'】';
        }
        p::first-letter{
            font-size: 50px;
        }
        p::first-line{
            background-color:#FFD23C;
        }
        p::selection{
            color: purple;
        }

    </style>
</head>
<body>

<div>
    hello,world wo shi shuaibi;
</div>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Accusamus ducimus enim et libero sunt voluptate
    voluptatibus. Ab consectetur, eius, eveniet ex fugit illo odio odit officiis praesentium qui quisquam, voluptas.</p>



</body>
</html>